TextGuru is a full fledged text editor for the iPhone. It let’s you organize files in nested folders, offers cut, copy and paste, can share files via wifi, and can import files via FTP and the Internet. It also serves as a viewer of common file formats such as PDF, MS Office, and more. It’s a jack of all trades utility for those serious about their documents.

DataCase allows you to both store documents on your iPhone and view them on the go.